Advertisements
Advertisements
Question
Explain the process of inspiration under normal conditions.
Solution
- The process through which fresh air enters the lungs is called inspiration. The diaphragm, intercostal muscles, and abdominal muscles play an essential role.
- The primary muscles of inspiration are the diaphragm and the external intercostal muscles. The contraction of the external intercostal muscles and diaphragm increases the volume of the thoracic cavity.
- Abdominal muscular relaxation occurs during inspiration, enabling the diaphragm to compress the abdominal organs. As the overall volume of the thoracic cavity grows, lung air pressure drops.
- Now that the body is under more pressure, air is entering the lungs more quickly. The airflow sequence is.
Mechanism of breathing
 |
| Inspiration |
 |
| Expiration |
APPEARS IN
RELATED QUESTIONS
What happens to the respiratory process in a man going up a hill?
Write a note on Hering-Breuer reflex.
Breathing is controlled by ______.
Which of the following is CORRECT with respect to vital capacity?
Which of the following statement is INCORRECT?
Assertion: One can voluntarily change the pattern of breathing.
Reason: The voluntary regulation of the respiration is done by cerebral cortex.
Which of the following is controlled by Hering-Breuer reflex?
Neurons located in the ______ control respiration.
Normally, human adults breathe i ______ times/min while a new born breathe ii ______ times/min.
Which one of the following is the CORRECT statement for respiration in humans?
Chemosensitive area of respiratory centre in medulla is affected by
Respiratory rhythm centre is situated in ______.
Respiratory process is regulated by certain specialized centres in the brain. One of the following centres can reduce the inspiratory duration upon stimulation.
Name any two respiratory centres required for regulation of breathing.
